<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Hadoop MAPREDUCE 2.0.4-alpha Release Notes</title>
<STYLE type="text/css">
	H1 {font-family: sans-serif}
	H2 {font-family: sans-serif; margin-left: 7mm}
	TABLE {margin-left: 7mm}
</STYLE>
</head>
<body>
<h1>Hadoop MAPREDUCE 2.0.4-alpha Release Notes</h1>
These release notes include new developer and user-facing incompatibilities, features, and major improvements. 
<a name="changes"/>
<h2>Changes since Hadoop 2.0.3-alpha</h2>
<ul>
<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-5117">MAPREDUCE-5117</a>.
     Blocker bug reported by Roman Shaposhnik and fixed by Siddharth Seth (security)<br>
     <b>With security enabled HS delegation token renewer fails</b><br>
     <blockquote></blockquote></li>
<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-5094">MAPREDUCE-5094</a>.
     Major bug reported by Siddharth Seth and fixed by Siddharth Seth <br>
     <b>Disable mem monitoring by default in MiniMRYarnCluster</b><br>
     <blockquote></blockquote></li>
<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-5088">MAPREDUCE-5088</a>.
     Blocker bug reported by Roman Shaposhnik and fixed by Daryn Sharp <br>
     <b>MR Client gets an renewer token exception while Oozie is submitting a job</b><br>
     <blockquote></blockquote></li>
<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-5083">MAPREDUCE-5083</a>.
     Major bug reported by Siddharth Seth and fixed by Siddharth Seth (mrv2)<br>
     <b>MiniMRCluster should use a random component when creating an actual cluster</b><br>
     <blockquote>Committed to branch-2.0.4. Modified changes.txt in trunk, branch-2 and branch-2.0.4 accordingly.</blockquote></li>
<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-5053">MAPREDUCE-5053</a>.
     Major bug reported by Robert Parker and fixed by Robert Parker <br>
     <b>java.lang.InternalError from decompression codec cause reducer to fail</b><br>
     <blockquote></blockquote></li>
<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-5023">MAPREDUCE-5023</a>.
     Critical bug reported by Kendall Thrapp and fixed by Ravi Prakash (jobhistoryserver , webapps)<br>
     <b>History Server Web Services missing Job Counters</b><br>
     <blockquote></blockquote></li>
<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-5006">MAPREDUCE-5006</a>.
     Major bug reported by Alejandro Abdelnur and fixed by Sandy Ryza (contrib/streaming)<br>
     <b>streaming tests failing</b><br>
     <blockquote></blockquote></li>
<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-4549">MAPREDUCE-4549</a>.
     Blocker bug reported by Robert Joseph Evans and fixed by Robert Joseph Evans (mrv2)<br>
     <b>Distributed cache conflicts breaks backwards compatability</b><br>
     <blockquote></blockquote></li>
</ul>
</body></html>
